“It’s packed in a box with tissue paper, and it will be donated to a museum,” she shares. As for her other couture pieces, “whichever daughter loves clothes more will get dibs on those.”

So far, it seems older daughter Sunday is winning that contest; Kidman reveals that she tries on dresses while her 4-year-old sits on the floor. And having such down-to-earth moments with her family seemingly helps the star brush off the endless cycle of gossip that comes with fame.

“As you get older … all of that other stuff becomes less important,” she says. “Like, I’ve always had a little belly. I mean, now that I’m 45, they don’t say, ‘Oh, she’s pregnant!’ as much. But I’ve got skinny arms and legs, and then I’ve got a little belly.” Uh, Nicole, trust us: You look pretty damn good.

For more with Kidman, pick up the November issue of Harper’s Bazaar, on newsstands Oct. 23, and visit harpersbazaar.com/nicolekidman for the full interview and even more stylish photos.